adriangb commented on code in PR #16589:
URL: https://github.com/apache/datafusion/pull/16589#discussion_r2178261730
##########
datafusion/physical-expr-adapter/src/schema_rewriter.rs:
##########
@@ -97,13 +101,111 @@ impl<'a> PhysicalExprSchemaRewriter<'a> {
&self,
expr: Arc<dyn PhysicalExpr>,
) -> Result<Transformed<Arc<dyn PhysicalExpr>>> {
+ if let Some(transformed) =
self.try_rewrite_struct_field_access(&expr)? {
+ return Ok(Transformed::yes(transformed));
+ }
+
if let Some(column) = expr.as_any().downcast_ref::<Column>() {
return self.rewrite_column(Arc::clone(&expr), column);
}
Ok(Transformed::no(expr))
}
+ fn try_rewrite_struct_field_access(
Review Comment:
That's expected: the point is that we need to implement struct casting as
part of the cast operator in general, not as part of this PR. That's the point
@alamb made in
https://github.com/apache/datafusion/pull/16589#discussion_r2176012085. Is
there any reason why we haven't done that since you've basically implemented it
for `SchemaAdapter`? I'd think it's the same code.
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